Abstract: The present disclosure describes techniques for detecting and mitigating a spoof communication within a network, such as a Session Internet Protocol (SIP) network. Determination and mitigation of spoof communication may be performed by a spoof mitigation module associated with a Home Public Land Mobile Network (HPLMN). A server, such as a SIP server, may receive a call request (i.e. SIP INVITE message) from an originating device to initiate a Voice over Internet Protocol (VoIP) communication with a recipient device. In response to the originating device being associated with a HPLMN subscriber account, the server may determine an origin network of the SIP INVITE message and compare the origin network with a most recent instance of registration data associated with the originating device and recorded within the HPLMN. A match indicates that the call request is likely reliable. A mismatch may indicate that the call request is likely a spoof communication.

Abstract: The present disclosure describes techniques for verifying an identity of an originating device that initiates a VoIP communication with a recipient device. Specifically, an attestation parameter module is configured to detect a call request associated with a VoIP communication that is initiated by an originating device. The attestation parameter module may authenticate an identity of the originating device, and in doing so, insert an attestation parameter into an identity header of a modified SIP INVITE message sent to the recipient device. In response to receiving the modified SIP INVITE message with the attestation parameter, the telecommunication network associated with the recipient device may verify the identity of the originating device based on the attestation parameter included within the SIP INVITE message.

Abstract: Systems and methods for preventing a robocall from leaving a voicemail are described. When an incoming call without a history information header (HIH) destined for a subscriber is detected, the incoming call is prevented from leaving a voicemail if the subscriber does not answer the incoming call. If the incoming call has the HIH, additional determination process based on a visited network address of the subscriber is performed to determine whether the incoming call is to be prevented from leaving a voicemail.

Abstract: Systems and methods for preventing a robocall from leaving a voicemail are described. When an incoming call without a history information header (HIH) destined for a subscriber is detected, the incoming call is prevented from leaving a voicemail if the subscriber does not answer the incoming call. If the incoming call has the HIH, additional determination process based on a visited network address of the subscriber is performed to determine whether the incoming call is to be prevented from leaving a voicemail.

Abstract: During call setup in a communication system, first and second communication terminals may negotiate regarding which codecs to use for a streaming media session. In some cases, the first communication terminal may support a prioritized codec that has been designated for preferential use. In cases where the second communication terminal does not support the prioritized codec, a serving network may nevertheless select the prioritized codec for media communications with the first communication terminal, and may perform transcoding between the prioritized codec and a non-prioritized codec that has been selected for use with the second communication terminal. For newly initiated sessions, however, the serving network may determine the amount of resources that are available for transcoding. When there are limited resources, the serving network may opt to not use the prioritized codec in the situation described above, and may instead use a non-prioritized codec for end-to-end communications, without transcoding.

Abstract: Systems and methods for preventing a robocall from leaving a voicemail are described. When an incoming call without a history information header (HIH) destined for a subscriber is detected, the incoming call is prevented from leaving a voicemail if the subscriber does not answer the incoming call. If the incoming call has the HIH, additional determination process based on a visited network address of the subscriber is performed to determine whether the incoming call is to be prevented from leaving a voicemail.

Abstract: Technologies for network configuration using dynamic voice codec and feature offering are described herein. A translation codec is used to allow a device capable of using enhanced voice services to use the enhanced voice services when communicating with a device that is not capable of using enhanced voice services.

Abstract: Systems and methods for classifying and routing an inbound call using ENUM queries are described. When a calling party initiates an inbound call, an Interconnect Session Border Controller (I-SBC) may generates a query for a calling party number (CgPN) and a called party number (CdPN) to search CgPN information and personal number block (PNB) information in a first E.164 Number to URI Mapping (ENUM) database. If the I-SBC is able to check the CgPN using the first ENUM database, the I-SBC may set a parameter of the inbound call to a first status to avoid further checking. Otherwise, the I-SBC may set the parameter to a second status, and the inbound call, tagged with a service provider identification (SPID) number associated with the classification found in one or more of the ENUM databases, is processed based on the SPID.

Abstract: During call setup in a communication system, first and second communication terminals may negotiate regarding which codecs to use for a streaming media session. In some cases, the first communication terminal may support a prioritized codec that has been designated for preferential use. In cases where the second communication terminal does not support the prioritized codec, a serving network may nevertheless select the prioritized codec for media communications with the first communication terminal, and may perform transcoding between the prioritized codec and a non-prioritized codec that has been selected for use with the second communication terminal. For newly initiated sessions, however, the serving network may determine the amount of resources that are available for transcoding. When there are limited resources, the serving network may opt to not use the prioritized codec in the situation described above, and may instead use a non-prioritized codec for end-to-end communications, without transcoding.

Abstract: An anchoring network device of a telecommunications network can receive a first initiation request of a communication session and determine a second request indicating a different media capability than the first request. A network gateway can modify packets of the session, e.g., by transcoding between the capabilities. In some examples, the anchoring device can determine that a codec list of the initiation request corresponds to a rewrite rule. The device can apply the rewrite rule to the request to provide a second request listing a second, different codec. In some examples, the anchoring device can determine if there is a common media capability between the first initiation request and a predetermined exclusion list. If not, the second request can include at least one capability not in the first request, e.g., an Enhanced Voice Services (EVS) Channel-Aware-mode (ChAw) codec.

Abstract: An anchoring network device of a telecommunications network can receive a first initiation request of a communication session and determine a second request indicating a different media capability than the first request. The different capabilities can share a payload format. A network gateway can modify headers of packets to change between the capabilities. In some examples, the anchoring device can determine that a codec list of the initiation request corresponds to a rewrite rule. The device can apply the rewrite rule to the request to provide a second request listing a second, different codec. The first codec and the second codec can both be associated with a common payload format. The network gateway can modify first packets from a first to a second terminal to replace first-codec headers with second-codec headers and vice-versa.